<?php

/**
 * @file
 * filefield_handler_field_data.inc
 *
 * Provides a handler for displaying values within the serialized data column.
 */
class filefield_handler_field_data extends views_handler_field_node {

    function option_definition() {
        $options = parent::option_definition();
        $options['data_key'] = array('default' => 'description');
        return $options;
    }

    function options_form(&$form, &$form_state) {
        parent::options_form($form, $form_state);

        $options = array();
        $info = filefield_data_info();
        foreach ($info as $key => $data) {
            $options[$key] = $data['title'] . ' (' . $data['module'] . ')';
        }

        $form['data_key'] = array(
            '#title' => t('Data key'),
            '#type' => 'radios',
            '#options' => $options,
            '#required' => TRUE,
            '#default_value' => $this->options['data_key'],
            '#description' => t('The data column may contain only a few or none any of these data options. The name of the module that provides the data is shown in parentheses.'),
            '#weight' => 4,
        );
    }

    function admin_summary() {
        // Display the data to be displayed.
        $info = filefield_data_info();
        return isset($info[$this->options['data_key']]['title']) ? $info[$this->options['data_key']]['title'] : $this->options['data_key'];
    }

    function render($values) {
        $values = drupal_clone($values); // Prevent affecting the original.
        $data = unserialize($values->{$this->field_alias});
        $values->{$this->field_alias} = filefield_data_value($this->options['data_key'], $data[$this->options['data_key']]);

        // Copied from views_handler_field_node(). We just remove the call to
        // sanitize_value() from the original call, becaue our value has already
        // been cleaned by filefield_data_value().
        return $this->render_link($values->{$this->field_alias}, $values);
    }

}
